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  • PhD Defense - Zahaib Akhtar

    Wed, May 29, 2019 @ 10:00 AM - 12:00 PM

    Thomas Lord Department of Computer Science

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    PhD Candidate: Zahaib Akhtar
    Wednesday May 29th, 2019
    10:00a.m. - 12:00
    Location: SAL 2nd Floor Conference Room
    Committee: Antonio Ortega, Barath Raghavan, Ramesh Govindan

    Understanding and Optimizing Video Delivery

    In this work, we strive to understand and optimize the performance of systems which serve video over the Internet. Towards this end, we make the following three contributions. First, we perform a systematic study of the video management plane -- the systems which form the video delivery pipeline. Second, we propose an approach called Oboe to improve the performance of client side video players by tuning Adaptive Bitrate Algorithms to the characteristics of a network. A range of different algorithm when augmented with Oboe improve their performance by up to 25%. Finally, we propose a caching algorithm called AVC which is specifically tailored for video workload. AVC outperforms state of the art caching algorithms by exploiting various properties of adaptive bitrate video. In particular, a LRU cache requires 3x the memory used by AVC to match its performance.

    Location: Henry Salvatori Computer Science Center (SAL) - 213

    Audiences: Everyone Is Invited

    Contact: Lizsl De Leon

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